WebContext.setPreferredLanguages

Set the list of preferred languages.

Set the list of preferred languages, sorted from most desirable to least desirable. The list will be used in the following ways:

• Determining how to build the Accept-Language HTTP header that will be included in the network requests started by the #WebKitWebContext.
• Setting the values of navigator.language and navigator.languages.
• The first item in the list sets the default locale for JavaScript Intl functions.